Improved vise



UNITED STATES PATENT OFFICE.,

PETER CROWL, 0E BROWNSVILLE, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND H. H. FINLEY,

OF SAME PLACE.

IMPROVED VISE.

Specification forming part of Letters Patent No. 55, 200, dated May 29, 1866.

To alt whom t may concern Be it known thatA I, PETER ORowL, of Brownsville,in the countyof Fayette and State of Pennsylvania, have invented a new and useful lmprovenent in Vises; and I do hereby declare Jthat the following' is a full, clear, and exact description thereof, reference being made to the annexed drawings, made part of this specification, in whichv Figure l is a perspective view of a vise attached to a bench, and Fig. 2 is a horizontal section ofthe same. y

The saine letters in the different figures refer to identical parts. A

A and A are the jaws of the vise, the stocks of which are so curved as that they lie horizontally. The jaw A is permanently secured to the yole B, which, passing over its stock, is bolted securely to a plate, C, attached to the bench D. Under the stock of thejaw A passes that of the jaw A, which extends back across the plate C, asY shown, and has rackteeth cut in one side. This jaw A, whileit h'ts snugly, plays freely' back and forth.

Into the rack-teeth on the side ot' the stock of thejaw A plays the ratchet E, allowing the jaw A to be pressed by hand against the object to be secured, but preventing its relaxation. Against this ratchet presses the hairspring F, attached by the bolt G to the plate C.

The ratchet is hinged by a pivot to the ec centric-dog D, the head of which rests upon the plate C, while its stern passes through this plate and Ithrough the bench, where it is firmly attached to the lever M, which plays below the bench horizontally, being actuated by a cord, K, passing around the pulley O, under the bench-top, and thence over the pulley L fastened to a DOS, P, passing from the benchtop to the iioor.

The springN (like the mainspring of a gunlock) actuates/the lever M in the opposite direction from the rope. This spring must be stronger than the hair-spring, s0 that when the rope is relaxed it will not only force back the lever M, but also, by means of the eccentric-dog D, operating upon the ratchet E, lift the same out of gear with the rack, so as to permit the jaw to b e withdrawn by hand when the object in the vise is to be removed.

The lower end of the rope K is attached to the treadle H, which is hinged to the back of the bench, and maybe -secured in any position by the teeth` of the rack I.y

L is a guard upon the outer edge of the pulley L t0 prevent the displacement of the rope.

In operating with this vise the object to be secured is placed between the jaws. The jaw A is then pressedagainstit by hand. Then,if the object is solid, bypressing the foot upon the treadle, the ratchet E pressing with great force against the rack by meansof the lever, the object is lirmly secured, the treadle being held A at whatever point this stress may be secured. Should the object yield to the pressure, by working the treadle up and down the jaws Will be continuously compressed.

Havin g/full y explained the construction and operation of my improved vise, what Il claim as my invention, and seek to secure by Letters Patent, is-

In combination with the movable jaw A,

having a rack upon the side of its stock, thev ratchet E, dog D, lever M, and springs F and N, arranged and operating substantially in the manner and for the purpose set forth.

In testimony whereot'l have signed my name to this specication in the presence of two subscribing witnesses.

PETER GROWL.

Witnesses JAooB LoMsrUTER, JosErH N. BARTAN. 

